package com.xigege.nio.bufferAndChannel;

import java.nio.ByteBuffer;

public class ReadOnlyBuffer {
    public static void main(String[] args) {
        // 创建一个buffer
        ByteBuffer byteBuffer = ByteBuffer.allocate(64);

        for (int i = 0; i < 64; i++) {
            byteBuffer.put((byte)i);
        }

        //读取
        byteBuffer.flip();

        //得到一个只读的buffer
        ByteBuffer readOnlyBuffer = byteBuffer.asReadOnlyBuffer();
        System.out.println(readOnlyBuffer.getClass());

        //读取
        while (readOnlyBuffer.hasRemaining()) {
            System.out.println(readOnlyBuffer.get());
        }

        readOnlyBuffer.put((byte)100);  //ReadOnlyBufferException
    }
}
